An examination of some of the key principles of design showing how these underlie much of what we know of art, mathematics and science. It covers such topics as number, ratio and scale, rhythm and harmony, similarity and contrast and suggests how these may relate to the total design problem. As visual imagery is an important aspect of design, graphics form a vital part of the book. Each pair of pages can be seen as an event with illustrations and captions complementing the text often in unusual combinations.